Fuse for bombs



Patented Sept. 12, 1.950 21 Leo T; Meister, HillsideyN.

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The invention described hereinmayfbey manu-f. factured and used by .or forA the .CrovernmentzfonA governmental purposes without the. payment to meofanyroyaltythereon.

This invention relates tovfa Vnewand useful im. proyement in fuzes Afor .bombs `andi Lisi. .designed more particularly for use on vaerial bombsefor; attacking submarines or other .subaqueous'ftar` gets. It is operativeon` abombI which :is'lsubf: jected to an impact with the surfacelof-the water. and an impactwith the target, the formerimpact arming the fuze and thelatter impactcaus' ing the fuze to explode the-bomb '.The .par-'r ticularly novel feature of .-myrimproved-.fuze the means provided -for maintaining the lfuze une;k armed before and after tA'is-Sdropped untilits impact with the surface of .the-water:y iorflarming' the fuze by such impact whileipreventingf-explod ing of the bomb by such impact, andr-forexpl d" ing the bomb by its impact on thetarget.

The structure and operation of.-thexfuZe-otthis invention is substantially equivalentlto-thel fu'ze.- of my invention described. -andfclaimed iin/my copending application for Letters Patent entitled',v Fuzes for Bombs, Serial Number 683,378, ledl July 13, 1946. In thisl-applicationr,fmyinvention; relates to a mechanicallydetonated fuz'egi-while my copending applicationaforesaid relate'slto nl electrically detonated fuze'.

While I have lillustrated inthe! draw herewith` and have hereinafterfullyl describedl one specic embodimentof .mly invention, v-it `i^s-to` be distinctly understood that yI--dvo not consider' my invention to be limitedv to saidfspeciiiceme'fbodiment, but refer for its scope to `the-claims appended hereto. f- 1 'V- In the drawings: n y

Fig. 1 is a longitudinal vertical sectionypartlyi in elevation, of a bomb. providedwith fmylim'- proved fuze, the parts beingv shownV in.v unarmed position. al? l Fig. 2 is an enlarged fragmentary section, part-l ly in elevation, showing the .parts of-thef1.xze'=in armed position.

Fig. 3 is an enlarged fragmentary.sectlon,part

1y in elevation, showing the parts .in 'lringf-posifj tion. Fig. 4 is a detail perspectiveaotthe yoke V and bracket for the ring pin. 'Y v As illustrated in the drawing, my

gemeiimproved fuze is applied to albomb intended for launching*v from a plane for attack on a submarineavIhel bomb has a charge-.carryingfhead I'with nosfeZl'- and tail 3. A hollow-cone charge 4 is carried-iinhead I and provided with'- booster chargeeCiin 'act ofi: ,0,V 192s; 37o; o. 13.757)

container Ethreaded into the forward endofrbd'y 6 threaded into tail 3 and extending'v forwardly" into charge 4.1L The -body6 has an axial borel extendingrearwardly from container 5to a transi verselbore 8 inmbody 6. Slidablein bore 8, there h'astwo*spaced-bores*II and I2 so positioned inf;l blocky Saas :to be brought into axial alignment y with bore jl, alternatively, by..-recipr0`cation-o'ff` blcck'fl). Bore II `extends-through blocl; Sand has threadedthereina container I3 for primer Pswith` an axialbore III-.in rits rear wall... Bore I2 extends into block-'.9 from its rear face and receives thereina lbolt I5 urged -rearwardlyby coil@springiflseatedinvfor'ward end of borellfi.l

The-".blocksB-has onitsforwardface-a slot Il 'ex-.if l tending downward-lylfromtheltop of block` 9, inl l n which-ris received. a stop pin IB thre'aded-hori-1v zontally.through/tbody 6 from -it`s forward face the container I3 forprimer P. A iiring pin 20V ha'slits.fcyliridrieahbody.2Islidable in bore 2211i tail 3 eo-axial with bore 1. The rear face of body is-'covered by althinfplate 23 of-suitable metal such as aluminum. The pin-20 passes through'ani orifice 24in platev23 andthe forward endof vi't's. body 2I -isvdisposed against the rear face-of plate;A 23".v QAyokefor-'fork- 25 embraces pin 2D andjhasL a-gbracket; arm v2G received `in a slot '21r in `block- Sfan'd is `fastened `therein by afset screw 28 thregclef` K Avsafety pin- 2.9;passed through -tail3 and body engages' up- ,y y per-endof block B-Yto hold it in unarmed position 'l ed'in-block 3 yfrom its v'upper face.

(Fig. p l @The parts-may-'be assembled inthe followingv mannerr Container y I3 with primer P is placed in'bor'e III of bloclr9-'which` isthen placed'in bore" 8fand forced downltofcornpress spring I0' placed below block-Slfand held in this position as byl a" temporary pin through hole in body 6 providedf,

infb'ody EIi. Springll and bolt I5v are vpassed Y through slot-I9 in body 6 andseated'in'bore |25 Yoke. assis then seated onrbiock its brakt zsbemgfastened in H.5191-, 21 by s'et screw 28. Pla-teneis' then applied( tobody'f,v andring Pin' 2Bris?passedthroughV orice24 andy@ke 25 to Satl y in socket iE--a in bolt l5. The temporary pin is removed from body 6. Body 6, carrying its associated parts, is then passed rearwardly through head E, its nose 2 being off, and threaded into tail 3, the body 2i of pin '20 being received in bore 22 of tail 3 and pin 29 is seated. Container with booster charge C thereinis threaded into body plosive charge 1i and nose 2 is placed on head l.

When the bomb is about to be launched, the safety pin 29 is removed, and the fuze is maintained unarmed by pin 2!) seated in bolt I'Fiireel i of 'the bomb-on the target. 4

venting upward movement of block 9 so thatthe lead in train is interrupted.

when the bomb is dropped fiithe'piaieifte attack the submarine, the force oi its impact on the water is sufficient to cause the bolt l5' to move forwardly oir of the ringfffpin'f against-the thrust of spring i6 to therebyireleaseblock 9 which is then projectedefupwardly by its spring l0, the parts assuming the position of Fig.` 2, to arm the fuze. ,f Y

Itis to be particularly noted -that the .pin 2,0 is restrained from forward movement, fon this first impact, by the plate '2,3 bearing against the body 2 i, and the yoke 25 which bears against `the forward face of plate 25. surrounding pin 2o. IThis isa-n important feature of my improved. fuze, and

`itI is obvious from lFig. 1 that I'haveprovided means for holding the pin 2E! at rest when the bomb makes the impact with the water. It Will be noted (Fig. 4) that the yoke l2F, embraces pin 28 snugly so as to bear against wallr23 surroundingpin Ei and bearing against body 2|.

LWhen the blockQ has been moved upwardly (Fig.l 2) the yoke 25 is moved out ofthe pathof pin 2Q and that portion ofwall 23 about orice 2t. Stop pin it Ychecks-the.li'iward movement of block S, when `bore il carrying primer P is aligned with pin 2E and bore 'E leading to booster charge C, so that the lead in train is uninterrupted. i

When the bomb strikes the submarine or other object in the water, the impact Ycauses the pin 2Q to move forwardly, its body 2i rupturing the wall 23, and the body 2l slides onbottom. of slot i9, the'pin E@ passing through orice i4 of container i3 and striking primer P to detonatezthe bomb (Fig. 3).

Having described my invention whatgI claim v1. In a fuze for an aerialbomb, the combination of a slidable firing pin; a primer fired by percussion of said pin; a. slide in which said.

primer is mounted; a bolt slidable in said slide forengagement kwith said pin for locking said slide in iirst position to interrupt the` lead in train of the fuze, said bolt releasing said slide when moved out o f engagement with the pin by a first impact of the bomb; means to immobilize thepin until after said first impact; and means to move said slide to second position, when-rele ased,to bring the primer to position relative to the pin so that the lead-in train `is uninterrupted, said rimmobilizing means .being movable out of operative relation with respect to said pin inresponseto movement of said slide to said second position.

2,.In a fuze for an aerial `bomb for attacking` alsubaqueous target, vthe combination of a slidable ring pin; a primer fired by percussion of saidkpin; a slide in which said4 primer is mounted; a'bolt slidable in said slide for engagement with said pinhfor lockingl said slide -in position to interrupt the -lead in train ,of the yf uzepsaidboltl 4 releasing said slide when moved out of engagement with the pin by impact of the bomb on the Water; a frangible Wafer having a portion engaging a portion of said pin; a fork carried by said slide and engaging said portion of said Wafer to immobilize said pin on said impact; and means tQAmoVesaid-sIide, when,r released, 4to Lbring the prim'r to .jg'b'isitiorfrelative:v tsaid ,iso .that the lead in train is uninterrupted, and to move said fork out of engagement with said wafer, Vsaid pin rupturing the portion of the Wafer engaging the pinfaiid' sliding to re the primer, on impact 3. In a bomb f uze, the combination of a hous ir'ig 'havingan laiial passage therethrough and a ,t transverse bore intersecting said passage; an explosive charge at one end of said passage; a fir- -ingpinfat-thelother end of said passage; a block slidable-in said bore; a primer mounted in said block; a bolt slidable in said block and having an axial socketior-receiving the pin therein; afspringfffor sliding said block; and a springor sliding "said bolt, the ip'arts being `so constructed and related that when thespin is received `inthe bolt socket, the block 'spring is tensioned,"fthe block ispositioned to-holdfthe-:primer outof the passage, thus-interrupting the lead fin tra-infami the 'fuze-is unarmedpandthat whenthe fu'zeiis subjected to impact'the boltm'ovesioff `o'f the thus releasing, the block which :is-*projected tby its spring tobi-ing the primer,4 into the`passage so that the lea-d in train is uninterrupted-and subjected, to a second impactfthei'pin 'fdriven into the primerto fire :the explosive charge.

s 4. Infa bomb fuze, the combination'of'a nous`` socket'for receiving `the pin thereinya frangibleV Wafer disposed in -said passage; `a fork carried byisaidv block; a spring for sliding'said block;and a -spring for sliding-said bolt, the parts being-so constructed andrelated that, when the piniis received inthe 'bolt"socket, the block spring tensioned, the block is positioned to #hold vthe primerV out-of thel passage; thus interrupting the lead -in train, and the--fuze vis unarmed, `that when the Vfuze is subjected to impact -the vbolt movesoif the pingthus' releasingthe block which is projected by its spring to `bring the primeninto theV passage so that the-lead in train isuninterrupted and the fuze is armed, and--thepinis-'immobilized by the wafer and thenfork when the theefuzefis'subjectedto said impact, andthe-fork is :moved by -t-heprojectedblock out of fitsposi'-, tionforimmobiliaing'.` the pin, Aand that :when-the fuze is subjected to a second impact the pin'T-ptures;- the Wafer, f-slide's -infsaid -fpassage 'fand detonatessaid primer which` ydetona'tesA said 'explosivey charge.

5. `fuze ycomprising a body having imui-.nally normalfirst andsecond intersectingfbores there*- in, a firing pin slidably mounted in said body in With-said second lborevand ini-ing pin, fmeans. urging gsvaid block iintoffsaid "secondf fpositio'n, Fire- A leasable means retaining said block in rst position against the action of said urging means, said releasable means comprising a bolt slidable in said block and engaged by said firing pin, said bolt being slidable relatively to said block in response to a first impact of said fuze, to clear said ring pin and release said block for movement to said second position, and abutment means movable as a unit with said block and interposed in the path of movement of said ring pin to positively prevent movement thereof when said block is in said first position only.

6. A fuze comprising a body having mutually normal first and second intersecting bores therein, a firing pin slidably mounted in said body in alignment with said second bore, a primer, a block carrying said primer and slidable in said first bore between said second bore and said firing pin from a rst position in which said primer is out of alignment with said second bore, to a second position in which said primer is aligned with said second bore and firing pin, means urging said block into said second position, releasable means retaining said block in rst position against the action of said urging means, said releasable means comprising a bolt slidable in said block and engaged by said firing pin, said 6 i bolt being slidable relatively to said block in response to a first impact of said fuze, to clear said 'firing pin and release said block for movement to said second position,A abutment means movable as a unit with said block and interposed in the path of movement thereof When said block is in said iirst position' only, said iring pin having an enlarged rearward end, said abutmenty means comprising a slotted 4abutment tting over said pin and preventing movement of said enlarged end therethrough. n

y EEO T. MEISTER.

REFERENCES CITED The following references are' of record inthe le of this patent:

UNITED STATES vPA'IEN'I'S 257,335 Great Britain Aug. 27, 1926 

